package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.net.URI;
import java.util.List;

/**
 * @author Rui
 * @version 1.0
 * @date 2020/11/4 8:41
 */

@RestController
@Slf4j
public class OrderController {

//    地址不能写死，根据提供服务名称访问
//    private static final String PAYMENT_URL = "http://localhos t:8001";
    private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;

    @Autowired
    private LoadBalancer loadBalancer;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        log.info("*****Consumer 插入数据：" + payment);
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        log.info("*****consumer 查询数据：" + id);
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            log.info(entity.getBody().toString());
            return entity.getBody();
        }else {
            return new CommonResult<>(444, "操作失败！！");
        }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> serviceInstances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if (serviceInstances == null || serviceInstances.size() <= 0){
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instance(serviceInstances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb", String.class);
    }

}
